Wanyà «dà  (, literally "wheel (輪) monk (å ¥éÂÂ)"), also known as "Firewheel" or "Soultaker", is a yà Âkai depicted in Toriyama Sekien's collection of yà Âkai illustrations, Konjaku Gazu Zoku Hyakki. He is a relatively well-known yà Âkai; the earliest reports of him date back to the Heian period.
In Konjaku Gazu Zoku Hyakki, Toriyama Sekien depicts Wanyà «dà  as a figure with a male face attached to the center of an ox cart wheel wrapped in flames. The accompanying explanatory text states the following:
Wanyà «dà  steals the souls of those who see its form. The instruction to paste a paper reading "This place is the village of Shà Âbo" (Japanese: æ¤æÂÂÃ¥ÂÂæ¯Âã®éÂÂ) on the door of a house as a charm means that Wanyà «dà  cannot approach. The phrase "This place is the village of Shà Âbo" is derived from an anecdote in the "Biographies of Zou Yang" from the Records of the Grand Historian (Shiji). In the story, Zengzi, a disciple of Confucius and the founder of a school of Confucianism in China, refused to set foot in the village of "Shà Âbo" (Chinese: Shengmu; literally "Defeating Mother" or "Winning over Mother") because he disliked the name, which implied overcoming one's mother.
Various folklore also purports him as the condemned soul of a tyrannical daimyà  who, in life, was known for having his victims drawn on the back of an ox cart. He is said to guard the gates of Hell, and to wander back and forth along the road between this world and the underworld, scaring townsfolk as he passes and stealing the souls of anyone who gets too close in order to bring them to Hell with him.
Sekien's Wanyà «dà  is considered to be drawn based on the "Katawaguruma" (Wheel) yà Âkai (Volume 1, "The Matter of the Katawaguruma of Higashinotoin, Kyoto") recorded in Shokoku Hyakumonogatari (One Hundred Tales from Various Provinces) published in 1677 (Enpà  5), due to its shape and content. Although "Katawaguruma" and "Wanyà «dà Â" are depicted as separate yà Âkai in Konjaku Gazu Zoku Hyakki, they are thought to be separate works created using the same legend as material.
The illustration in Shokoku Hyakumonogatari depicts a Katawaguruma in the form of a face attached to the center of a wheel. Wanyà «dà  is depicted as male and Katawaguruma as female, and they are interpreted as such today; however, the depiction of Katawaguruma as a female began with the Shokoku Rijindan (Tales of Country Folk from Various Provinces) published in 1743 (Kanpà  3). Differences in depiction (whether a human face is attached to the wheel or a woman is riding the wheel) already existed in illustrations in printed books prior to Sekien. It is believed that "Katawaguruma," which was originally exactly the same legend, may have branched into two yà Âkai: Katawaguruma and Wanyà «dà Â.
One of the most famous legends comes from Kyoto, Japan. As Wanyudo rolled through the town, a woman peeked out her window at him. Wanyudo told her "Instead of looking at me, have a look at your own child!"
She looked down at her baby to find him lying on the floor in a pool of blood with his legs missing.
When she looked back outside at the demon, she saw her baby's legs in his mouth as he ate them.